these 11 derivations will be built:
  /nix/store/crz92dgihc97b11k13jc26nji6g9icy0-unit-niks3.service.drv
  /nix/store/123mywp9yd1w0hmpn3wn3h5isw5gjss1-system-units.drv
  /nix/store/prqa6xxv55qnwnv2ylbv1a68fn94sbxx-etc.drv
  /nix/store/zlv1kp36sn8hdqbnhsqqgbpi2d0z3s4a-activate.drv
  /nix/store/161a2wbsmr37hq5jfkh3sd5ssrsj8glh-nixos-system-server-test.drv
  /nix/store/lai7dwk55k3s3l5bgvkg5dxvz3inns5j-closure-info.drv
  /nix/store/fd9a8408qba2pvihr466nhf3ylrzxk0v-run-nixos-vm.drv
  /nix/store/kkfdyh1qazzz9prgylmy4l1i3qlwpnn1-nixos-vm.drv
  /nix/store/dz43j93463rz9rm9yx6ngyclf1wsppny-driverConfiguration.json.drv
  /nix/store/r4jigxp4cz8f51bvkfhxx2w22iq3abw5-nixos-test-driver-nixos-test-external-signer.drv
  /nix/store/jhnly9vqspviakqbyhlgsdq7azwlgjb5-vm-test-run-nixos-test-external-signer.drv
Failed to find a machine for remote build!
derivation: jhnly9vqspviakqbyhlgsdq7azwlgjb5-vm-test-run-nixos-test-external-signer.drv
required (system, features): (aarch64-linux, [kvm, nixos-test])
1 available machines:
(systems, maxjobs, supportedFeatures, mandatoryFeatures)
([aarch64-darwin, x86_64-darwin], 8, [big-parallel, recursive-nix], [])